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A fluid supply system for supplying a fluid draw-off such as for example domestic showers includes a fluid blending valve discharging blended liquid into a recirculation pipeline delivering to the draw-off and returning to a cold inlet of the blending valve, liquid recirculation occurring when the d

A fluid supply system for supplying a fluid draw-off such as for example domestic showers includes a fluid blending valve discharging blended liquid into a recirculation pipeline delivering to the draw-off and returning to a cold inlet of the blending valve, liquid recirculation occurring when the draw-off is closed, and a pump is preferably provided to ensure satisfactory recirculation. At least a portion of the recycled liquid is fed to a heat exchanger. To ensure that the temperature of the recycled liquid is maintained at a desired value, which is particularly desirable in the case of a shower installation where excess temperature can be physically dangerous, an additional thermostatic control valve is provided responsive to the recycled liquid temperature and operatively associated with the heat exchanger to maintain the recycled liquid temperature.

대표청구항 ▼

A recirculation fluid supply system for the supply of temperature blended fluid to a draw-off comprising: a. a thermostatic blending valve having: i. hot and cold inlets for receiving relatively hot and cold fluids respectively from supply sources; ii. a mixing portion wherein mixing of the hot and

A recirculation fluid supply system for the supply of temperature blended fluid to a draw-off comprising: a. a thermostatic blending valve having: i. hot and cold inlets for receiving relatively hot and cold fluids respectively from supply sources; ii. a mixing portion wherein mixing of the hot and cold fluids occurs; iii. a temperature control portion receiving blended fluid from the mixing portion and including a thermostat; iv. valve means operable by the thermostat to regulate the openings of the hot and cold inlets; and v. a blended fluid discharge from the temperature control portion; b. a supply conduit connected to the blended fluid discharge of the blending valve for the supply of temperature blended fluid to the draw-off; c. return conduit means for recirculating the bulk of the temperature blended fluid from the draw-off to the thermostat of the blending valve when the draw-off is closed so that the thermostat of the blending valve is responsive to the temperature of the recirculated blended fluid; d. means for pumping the blended fluid in the supply conduit and in the return conduIt means; and e. temperature control means to maintain the temperature of the recirculated blended fluid at the desired draw-off temperature whereby the thermostat responsive to the recirculated fluid temperature operates to set the valve means of the blending valve for delivery of blended fluid by the valve at the desired draw-off temperature when the draw-off is re-opened. A calorifier unit for use in a fluid recirculation supply system supplying a draw-off, the unit comprising a vessel having a fluid outlet adapted for connection to a conduit delivering fluid to the draw-off and a fluid inlet adapted for connection to a return conduit from the draw-off; a thermostatic blending valve mounted on the vessel and having inlets for hot and cold liquids to be blended, a discharge for blended liquid discharging into the vessel, and a temperature responsive element controlling the blended liquid temperature located in the vessel to be responsive to the temperature of the fluid therein; fluid heating means projecting into the vessel, and a temperature controller for the fluid heating means carried by the vessel and controlling the operation of the heating means to maintain the temperature of liquid in the vessel at a predetermined value.